The book discusses in detail the history of armored trains that are on the armament of the Polish army from the end of the Soviet war to the end of the 1939 war campaign. The book discusses in detail not only the history of individual compositions, but also their organisation and equipment. Adam Jonca is an undisputed expert on the subject, and he treats the book Polish Armored Trains 1921 - 1939 as particularly close to his interests.